The present invention discloses a control method for cross-domain call and connection of ASON. Firstly, a multi-layer network structure is constructed; a network element in parent domain corresponds to a child domain and can communicate with the network elements in the child domain; after the input NCCdi of the bottom-layer domain Ddi receives a cross-domain call processing request from the CCCc1 at the calling side, it sends the request up to the input NCCfi of the parent domain Dft; the NCCfi transmits a call coordination to the output NCCfo, and NCCfo sends a call indication to the CCCc2 at the called side through the output NCCdo corresponding to the child domain Ddo; NCCdo transfers a call confirmed to NCCfi via NCCfo, and NCCfi transmits a connection processing request to CCfi; CCfi triggers a local connection processing, and when the parent domain CCf performs SNC processing during this process, it needs to implement the sub-connection processing of the corresponding child domain and return the SNC Confirmed; CCfi returns the Connection Confirmed to NCCfi, and then to CCCc1 via NCCdi. The present invention solves the control problem that the present standards and techniques can not realize the cross-domain call and connection of ASON.